See https://developer.yahoo.com/fantasysports/guide/ for details

player_resource_example.xml

<?xml version="1.0" encoding="UTF-8"?>
<fantasy_content xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" xmlns="http://fantasysports.yahooapis.com/fantasy/v2/base.rng" xml:lang="en-US" yahoo:uri="http://fantasysports.yahooapis.com/fantasy/v2/league/223.l.431/players;player_keys=223.p.5479" time="508.72206687927ms" copyright="Data provided by Yahoo! and STATS, LLC">
  <league>
    <league_key>223.l.431</league_key>
    <league_id>431</league_id>
    <name>Y! Friends and Family League</name>
    <url>https://football.fantasysports.yahoo.com/archive/pnfl/2009/431</url>
    <password>liss</password>
    <draft_status>postdraft</draft_status>
    <num_teams>14</num_teams>
    <edit_key>17</edit_key>
    <weekly_deadline/>
    <league_update_timestamp>1262595518</league_update_timestamp>
    <scoring_type>head</scoring_type>
    <current_week>16</current_week>
    <start_week>1</start_week>
    <end_week>16</end_week>
    <is_finished>1</is_finished>
    <players count="1">
      <player>
        <player_key>223.p.5479</player_key>
        <player_id>5479</player_id>
        <name>
          <full>Drew Brees</full>
          <first>Drew</first>
          <last>Brees</last>
          <ascii_first>Drew</ascii_first>
          <ascii_last>Brees</ascii_last>
        </name>
        <status>P</status>
        <editorial_player_key>nfl.p.5479</editorial_player_key>
        <editorial_team_key>nfl.t.18</editorial_team_key>
        <editorial_team_full_name>New Orleans Saints</editorial_team_full_name>
        <editorial_team_abbr>NO</editorial_team_abbr>
        <bye_weeks>
          <week>5</week>
        </bye_weeks>
        <uniform_number>9</uniform_number>
        <display_position>QB</display_position>
        <image_url>https://l.yimg.com/a/i/us/sp/v/nfl/players_l/headshots/20100903/5479.jpg?x=46&amp;y=60&amp;xc=1&amp;yc=1&amp;wc=164&amp;hc=215&amp;q=100&amp;sig=LTUFmLVwQ.kvKzbhSsG94w--</image_url>
        <is_undroppable>0</is_undroppable>
        <position_type>O</position_type>
        <eligible_positions>
          <position>QB</position>
        </eligible_positions>
      </player>
    </players>
  </league>
</fantasy_content>

player_stats_example.xml

<?xml version="1.0" encoding="UTF-8"?>
<fantasy_content xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" xmlns="http://fantasysports.yahooapis.com/fantasy/v2/base.rng" xml:lang="en-US" yahoo:uri="http://fantasysports.yahooapis.com/fantasy/v2/league/223.l.431/players;player_keys=223.p.5479/stats" time="3140.1500701904ms" copyright="Data provided by Yahoo! and STATS, LLC">
  <league>
    <league_key>223.l.431</league_key>
    <league_id>431</league_id>
    <name>Y! Friends and Family League</name>
    <url>https://football.fantasysports.yahoo.com/archive/pnfl/2009/431</url>
    <password>liss</password>
    <draft_status>postdraft</draft_status>
    <num_teams>14</num_teams>
    <edit_key>17</edit_key>
    <weekly_deadline/>
    <league_update_timestamp>1262595518</league_update_timestamp>
    <scoring_type>head</scoring_type>
    <current_week>16</current_week>
    <start_week>1</start_week>
    <end_week>16</end_week>
    <is_finished>1</is_finished>
    <players count="1">
      <player>
        <player_key>223.p.5479</player_key>
        <player_id>5479</player_id>
        <name>
          <full>Drew Brees</full>
          <first>Drew</first>
          <last>Brees</last>
          <ascii_first>Drew</ascii_first>
          <ascii_last>Brees</ascii_last>
        </name>
        <status>P</status>
        <editorial_player_key>nfl.p.5479</editorial_player_key>
        <editorial_team_key>nfl.t.18</editorial_team_key>
        <editorial_team_full_name>New Orleans Saints</editorial_team_full_name>
        <editorial_team_abbr>NO</editorial_team_abbr>
        <bye_weeks>
          <week>5</week>
        </bye_weeks>
        <uniform_number>9</uniform_number>
        <display_position>QB</display_position>
        <image_url>https://l.yimg.com/a/i/us/sp/v/nfl/players_l/headshots/20100903/5479.jpg?x=46&amp;y=60&amp;xc=1&amp;yc=1&amp;wc=164&amp;hc=215&amp;q=100&amp;sig=LTUFmLVwQ.kvKzbhSsG94w--</image_url>
        <is_undroppable>0</is_undroppable>
        <position_type>O</position_type>
        <eligible_positions>
          <position>QB</position>
        </eligible_positions>
        <player_stats>
          <coverage_type>season</coverage_type>
          <season>2009</season>
          <stats>
            <stat>
              <stat_id>4</stat_id>
              <value>4388</value>
            </stat>
            <stat>
              <stat_id>5</stat_id>
              <value>34</value>
            </stat>
            <stat>
              <stat_id>6</stat_id>
              <value>11</value>
            </stat>
            <stat>
              <stat_id>9</stat_id>
              <value>33</value>
            </stat>
            <stat>
              <stat_id>10</stat_id>
              <value>2</value>
            </stat>
            <stat>
              <stat_id>11</stat_id>
              <value>1</value>
            </stat>
            <stat>
              <stat_id>12</stat_id>
              <value>-4</value>
            </stat>
            <stat>
              <stat_id>13</stat_id>
              <value>0</value>
            </stat>
            <stat>
              <stat_id>15</stat_id>
              <value>0</value>
            </stat>
            <stat>
              <stat_id>16</stat_id>
              <value>0</value>
            </stat>
            <stat>
              <stat_id>18</stat_id>
              <value>6</value>
            </stat>
            <stat>
              <stat_id>57</stat_id>
              <value>0</value>
            </stat>
          </stats>
        </player_stats>
        <player_points>
          <coverage_type>season</coverage_type>
          <season>2009</season>
          <total>310.17</total>
        </player_points>
      </player>
    </players>
  </league>
</fantasy_content>